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<?php $data = [ ['foodType' => 'fruits', 'itemID' => 1, 'itemName' => 'apple'], ['foodType' => 'fruits', 'itemID' => 2, 'itemName' => 'banana'], ['foodType' => 'veggies', 'itemID' => 3, 'itemName' => 'carrot'], ['foodType' => 'veggies', 'itemID' => 4, 'itemName' => 'broccoli'] ]; function array_column_multi ($array, $column) { $types = array_unique(array_column($array, $column)); $return = []; foreach ($types as $type) { foreach ($array as $key => $value) { if ($type === $value[$column]) { unset($value[$column]); $return[$type][] = $value; unset($array[$key]); } } } return $return; } print_r(array_column_multi($data, 'foodType'));
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Array ( [fruits] => Array ( [0] => Array ( [itemID] => 1 [itemName] => apple ) [1] => Array ( [itemID] => 2 [itemName] => banana ) ) [veggies] => Array ( [0] => Array ( [itemID] => 3 [itemName] => carrot ) [1] => Array ( [itemID] => 4 [itemName] => broccoli ) ) )

preferences:
146.34 ms | 410 KiB | 5 Q